At cell level, respiration is the process in which biological systems oxidize different substrates, where the oxidizing agent is a substance that is external to the system itself. Historically, the term has been used when the substance which is the external electron acceptor is oxygen ( aerobic respiration). However, this definition should be widened to include the cases where the external electron acceptor is a substance other than oxygen (anaerobic respiration).
KeywordsCellular respiration Chemiosmotic hypothesis Electron transport Energy transduction Oxidative phosphorylation
References and Further Reading
- Castresana J (2004) Evolution and phylogenetic analysis of respiration. In: Zannoni D (ed) Respiration in archaea and bacteria. Diversity of prokaryotic electron transport carriers, vol 15. Springer, Dordrecht, pp 1–14Google Scholar
- Nicholls DG, Ferguson SJ (2002) Respiratory chains. In: Bioenergetics3. Academic, LondonGoogle Scholar